The perimeter of a semicircle is 20.56 mm what is the radius using 3.14 for pie

Ineed with number 17 i don’t get it at alll

What is the reflection image of (5,-3) across the line y = -x?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.